positionForPages[8]={page:8,positions:[{w:"➢",p:[0.060550,0.185932,0.089531,0.185932,0.089531,0.114294,0.060550,0.114294,0.028981]},{w:"摄影发展简史介绍",p:[0.089425,0.181779,0.382300,0.181779,0.382300,0.116890,0.089425,0.116890,0.036625,0.036625,0.036625,0.036625,0.036625,0.036625,0.036625,0.036500]},{w:"在一个不透明的暗箱前端开一个小孔，在暗箱后端贴一张白纸，作为光",p:[0.099875,0.266452,0.874875,0.266452,0.874875,0.222007,0.099875,0.222007,0.025000,0.025000,0.025000,0.025000,0.025000,0.025000,0.025000,0.025000,0.025000,0.025000,0.025000,0.025000,0.025000,0.025000,0.025000,0.025000,0.025000,0.025000,0.025000,0.025000,0.025000,0.025000,0.025000,0.025000,0.025000,0.025000,0.025000,0.025000,0.025000,0.025000,0.025000]},{w:"屏。被摄物体的反射光经过小孔，即可在暗箱的后端成倒立的实像，如",p:[0.099875,0.319785,0.874875,0.319785,0.874875,0.275341,0.099875,0.275341,0.025000,0.025000,0.025000,0.025000,0.025000,0.025000,0.025000,0.025000,0.025000,0.025000,0.025000,0.025000,0.025000,0.025000,0.025000,0.025000,0.025000,0.025000,0.025000,0.025000,0.025000,0.025000,0.025000,0.025000,0.025000,0.025000,0.025000,0.025000,0.025000,0.025000,0.025000]},{w:"图：用",p:[0.099875,0.370680,0.174900,0.370680,0.174900,0.326191,0.099875,0.326191,0.025000,0.025000,0.025025]},{w:"针孔成像",p:[0.174875,0.375663,0.274900,0.375663,0.274900,0.317338,0.174875,0.317338,0.025000,0.025000,0.025000,0.025025]},{w:"的原理制成的针孔成像箱，即将暗箱后端的白纸光屏换",p:[0.274875,0.370680,0.875475,0.370680,0.875475,0.326191,0.274875,0.326191,0.025025,0.025025,0.025025,0.025025,0.025025,0.025025,0.025025,0.025025,0.025025,0.025025,0.025025,0.025025,0.025025,0.025025,0.025025,0.025025,0.025025,0.025025,0.025025,0.025025,0.025025,0.025025,0.025025,0.025025]},{w:"成底片，这就是现代照相机的前身。",p:[0.099875,0.426489,0.499875,0.426489,0.499875,0.382044,0.099875,0.382044,0.025000,0.025000,0.025000,0.025000,0.025000,0.025000,0.025000,0.025000,0.025000,0.025000,0.025000,0.025000,0.025000,0.025000,0.025000,0.025000]}]};